kern_getdirentries
error = kern_getdirentries(td, fd, *bufp, buflen,
error = kern_getdirentries(td, fd, dirbuf, count, &base, &resid,
error = kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base,
int kern_getdirentries(struct thread *td, int fd, char *buf, size_t count,